Feasibility study of Dez arch dam heightening based on nonlinear numerical analysis of existing dam

• Autorzy: Hariri-Ardebili M. A. , Mirzabozorg H.
• Języki publikacji: EN

Abstrakty

EN

The Dez dam was commissioned in 1963 and since sediments accumulated in the reservoir up to an elevation of approximately 15m below the intake of the power tunnel. One of the possible measures to improve operation of the reservoir is by heightening of the existing dam. This paper describes the conducted procedure for static and thermal calibration of this 203m dam in Iran based on micro geodesies measurements. Also the nonlinear response of existing dam is investigated under maximum credible earthquake ground motions considering joint behavior and mass concrete cracking and safety of dam is evaluated for possible heightening. For thermal calibration of provided numerical model, transient thermal analysis was conducted and results were compared with thermometers records installed in central block. In addition, for static calibration; thermal distribution within dam body, dam self weight, hydrostatic pressure and silt load applied on the 3D finite element model of dam-reservoir-foundation were considered. Results show that the distribution of stresses will be critical within dam for heightening case under seismic loads in MCL.

Słowa kluczowe

EN

arch dam; Dez; numerical model; nonlinear analysis; safety evaluation; load combination

PL

tama łukowa; Dez; model numeryczny; analiza nieliniowa; ocena bezpieczeństwa; kombinacja obciążenia

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2013
• Tom: Vol. 59, nr 1
• Strony: 21--49
• Opis fizyczny: Bibliogr. 11 poz., il., tab.

Twórcy

autor

Hariri-Ardebili M. A.

• Department of Civil Environmental and Architectural Engineering, University of Colorado, Boulder, USA

autor

Mirzabozorg H.

• Department of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran

Bibliografia

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• 2. Behan-sad Engineering and consulting Co., Seismic hazard analysis of DEZ dam, 2009, Tehran, Iran.
• 3. Water and power ministry, Design and analysis of DEZ dam, 1963, Tehran, Iran.
• 4. G. LOMBARDI, and M. FANELLI, On the Lombardi slenderness coefficient for assessing cracking potential of arch dams, Proceeding of International Symposium on Arch Dams, China, 1992.
• 5. Federal Energy Regulatory Commission (FERC), Engineering guideline for the evaluation of hydropower projects-chapter 11: Arch dam design; Federal Energy Regulatory Commission Division of dam safety inspection, 1999.
• 6. H. MIRZABOZORG, and M. GHAEMIAN, Nonlinear seismic analysis of dam including dam-reservoir interaction (NSAD-DRI) user manual, 2002.
• 7. F. SHEIBANY, M. GHAEMIAN, Effects of environmental action on thermal stress analysis of Karaj concrete arch dam, ASCE, J. Eng. Mech., 132(5), 532-545, 2006.
• 8. Z. BOFANG, Prediction of Water Temperature in Deep Reservoir, Dam Engineering, VIII (1), 1997.
• 9. EM 1110-2-6053: Earthquake Design and Evaluation of Concrete Hydraulic Structures, U.S. Army Corps of Engineering (USACE), Washington D.C., 2007.
• 10. H. KUPFER, H.K. HILSDORF, H. RUSCH, Behavior of concrete under biaxial stresses, ACI Journal, 656-666, 1969.
• 11. ICOLD, Selecting Seismic Parameters for Large Dams, ICOLD Bulletin, 72, 1989.